The Chicken or the egg Conundrum

One of the things that really bugs me about diabetes is that I have no idea if the behaviour my 20-month old daughter is exhibiting is "normal" (for a toddler), or due to diabetes. When other Mom's see a hiccup in their kid's behaviour, it's easy to figure out if this is something most children that age go through, or if there's something else going on.

For me, it's always a choice between normal behaviour, diabetes, or something else. Here's my example:

Every day for the past five or six days, Elise has been waking up just 30 - 45 minutes into her nap, absolutely screaming. I don't have the luxury of letting her cry for a bit to see if she'll go back to sleep, so when I go in to check her BG, it's usually in the high 200s ( I do calm her down before I take it). Up until this time, she would sleep for about 90 minutes, and wake up generally happy with a BG anywhere from 90 to the mid 100s.

So my question is this, is she waking up screaming because she's high? Or is she high because she's waking up screaming? Or is there something else entirely causing both the waking up and the high numbers?

And is it normal for a toddler to have such a hard time staying asleep? She's definitely not getting enough sleep, and it's really starting to affect her disposition. When do I call the pedi about this? Or do I?

All her numbers are pretty normal across the board, otherwise. I am completely mystified by this.